On the way we passed this building with two youngsters kicking a soccer ball on what was probably an ancient walkway.

That's the Temple of Rome and Augustus (yes, that old). 15 years ago, that was where I re-found half my family, who got lost. Myself I didn't get lost, I had a map that was usable unlike yours :-) I am also surprised to hear that about street names; maybe they didn't put up new ones after changing street names, or maybe for preservation reasons, I don't know.

_{*Lunatic*, n.
One whose delusions are out of fashion.}